package com.food.order.websocket;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArraySet;

import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;

import com.alibaba.fastjson.JSON;
import com.food.order.model.criteria.Criteria;
import com.food.order.model.criteria.Restrictions;
import com.food.order.model.entity.Store;
import com.food.order.model.entity.TmpCache;
import com.food.order.model.entity.User;
import com.food.order.model.repository.TmpCacheRepository;
import com.food.order.utils.utils.PropertiesUtil;
import com.mysql.cj.log.LogFactory;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestParam;


@ServerEndpoint("/websocket/{sid}")
@Component
public class WebSocketServer {

    public static Map<String,Long> authLongTime = new HashMap<>();

    private static Logger log = LoggerFactory.getLogger(WebSocketServer.class);
    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;
    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    //接收sid
    private String sid="";
    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session, @PathParam("sid") Long sid) {
        if(!this.checkAuth(""+sid)){
            onClose();
            return;
        }
        this.session = session;
        webSocketSet.add(this);     //加入set中
        addOnlineCount();           //在线数加1
        log.info("有新窗口开始监听:"+sid+",当前在线人数为" + getOnlineCount());
        this.sid=""+sid;
        try {
            int actionType = WebsocketTypeEnum.SOCKET_SUCCESS.getIndex();
            WebSocketVo webSocketVo = new WebSocketVo();
            webSocketVo.setClientId(""+sid);
            webSocketVo.setType(actionType);
            webSocketVo.setDes(WebsocketTypeEnum.getName(actionType));

            String message = JSON.toJSONString(webSocketVo);
            sendMessage(message);
        } catch (IOException e) {
            log.error("websocket IO异常");
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息*/
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("收到来自窗口"+sid+"的信息:"+message);
        //群发消息
        for (WebSocketServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     *
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }
    /**
     * 实现服务器主动推送
     */
    public void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }


    /**
     * 群发自定义消息
     * */
    public static void sendInfo(String sid, int actionType,Map<String,Object> params) throws IOException {
        log.info("推送消息到窗口"+sid+"，推送内容:"+WebsocketTypeEnum.getName(actionType));
        WebSocketVo webSocketVo = new WebSocketVo();
        webSocketVo.setClientId(sid);
        webSocketVo.setType(actionType);
        webSocketVo.setDes(WebsocketTypeEnum.getName(actionType));
        webSocketVo.setParams(params);
        String message = JSON.toJSONString(webSocketVo,true);
        for (WebSocketServer item : webSocketSet) {
            try {
                //这里可以设定只推送给这个sid的，为null则全部推送
                if(sid==null) {
                    item.sendMessage(message);
                }else if(item.sid.equals(sid)){
                    item.sendMessage(message);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        if(WebSocketServer.onlineCount > 1) {
            WebSocketServer.onlineCount--;
        }
    }

    public static boolean checkAuth(String sid){
        if(sid == null) {
            return false;
        }
        if(!authLongTime.containsKey(sid)){
            return false;
        }
        Long endTime = authLongTime.get(sid);
        if(endTime < System.currentTimeMillis()){
            return false;
        }
        return true;
    }
}